NO, Not a bushing...That was the start of all the original problems with the first Phantoms when they first came out...You need to use a needle bearing, NOT a bushing in these motors.
www.bicycle-engines.com
No keep the needle bearing for the wrist pin. The bushing (I believe) were prone to failure in the v1 and v2 phantoms. Current v3 variants use a needle bearing.
Also try and find a phantom 85 that just comes with the cylinder (If that even exists). And instead buy an actual ms460 piston (People suggest buying a Hyway piston). More durable and can save you some money if you can actually find one a cylinder without a piston.
The V-2 had the needle valve when it came out, It was the V-1 that had the bushing.
The phantom actually makes an extra .5hp without a reed.
I'm was also super tempted to do something like this too. Same problem, lot of work at school. Plus equipment is an issue too (I actually found out I might be able to use my school's machine shop since I took the required course to access it ms660 in the future maybe lol). But If I was going to do this build I would opt for a ms460 and swap my 40(?)mm crank out for a 38mm since 40mm cranks are too much for the ms460 and it can "bolt right on" if you add m8 to m5 adapters, but for a 660 its actually its stock stroke so idk many options for the future.
It (V2) actually had a graphene impregnated bushing when it was first released. The needle bearing replaced it after a few months when the engines still kept failing. So the V2 had both styles. That is why I call needle bearing motors V2.1
From a few reports on the V3 I have seen, most of them already seem to come with a 38mm stroke crank. That was one of the changes on the V3 from what I understand. That and the minor shape changes to the ports to reduce ring snag, and a slight relocation of the ring end pins.
